The procedure was repeated at 300, 200 and 100 °C, resulting in a coverage dependent activation energy for ammonia desorption (if assuming zero activation for adsorption) according to the following formula:Edesorption,NH3=120.0(10.38θNH3)where θNH3 is the coverage of ammonia on the surface. ...
of said adsorbent bed is raised by the generated heat of adsorption. Subsequently, a heating medium comprising water, steam or a gaseous mixture containing steam is supplied and brought into direct contact with the adsorbent to perform heat exchange. Because adsorption heat is again generated at ...
This is because the heat capacity of the adsorbent affects the efficiency of energy conversion during the adsorption and desorption processes. Typically, the adsorption process is exothermic, while the desorption process requires heat. Therefore, if the adsorbent has a higher heat capacity, it is ...
The parametric study gives the variation of the maximum cooling capacity, the coefficient of performance and the second-law efficiency of a typical absorption cycle with operating variables. 1995. 展开 关键词: MODEL ADSORPTION EQUILIBRIA ORGANIC VAPORS ACTIVE CARBON MICROPORE-SIZE DISTRIBUTION ...
Zinc stearate was used as a reference compound to study the infrared spectra of zinc oxide (ZnO) catalyst substrates for the analysis of gas adsorption on the ZnO surface of colloidal stearate sealant .It is also used to prepare sample suspension injections needed to ...
Determination of adsorbable organic fluorine from aqueous environmental samples by adsorption to polystyrene-divinylbenzene based activated carbon and comb... Abstract A new method for the determination of trace levels of adsorbable organic fluorine (AOF) in water is presented. Even if the individual ...
Effect of pressure on the surface tension of water: Adsorption of hydrocarbon gases and carbon dioxide on water at temperatures between 0 and 50°C The variation of surface tension with pressure has been determined for water in equilibrium with compressed methane, ethylene, ethane, normal butane, ...
adsorption des desorption el electrical sorp sorption th thermal 1. Introduction The awareness of humankind’s role into climate change [1] and the increasing energy intensity in developing and underdeveloped countries [2] are among the main drivers for a more sustainable production and use of energ...
Predictive model and experimental results for a two-adsorber solid adsorption heat pump In this work a experimental study of a solar assisted heat pump with direct expansion of the refrigerant within the solar collector, is presented. The maximum exergy efficiency, defined as the ratio of the outl...
The parameters , and are coefficients to the rates of evaporation/condensation, absorption/exsorption and adsorption/desorption, respectively, all in the units . These coefficients should all be non-negative in order to satisfy the entropy inequality. For use later, the Gibbs potential of phase is...